From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AF268C433E9 for ; Wed, 13 Jan 2021 01:20:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 76BBA2311F for ; Wed, 13 Jan 2021 01:20:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726680AbhAMBUD (ORCPT ); Tue, 12 Jan 2021 20:20:03 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36712 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726118AbhAMBUA (ORCPT ); Tue, 12 Jan 2021 20:20:00 -0500 Received: from mail-qv1-xf35.google.com (mail-qv1-xf35.google.com [IPv6:2607:f8b0:4864:20::f35]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 45C89C061575 for ; Tue, 12 Jan 2021 17:19:20 -0800 (PST) Received: by mail-qv1-xf35.google.com with SMTP id az16so128740qvb.5 for ; Tue, 12 Jan 2021 17:19:20 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=vt-edu.20150623.gappssmtp.com; s=20150623; h=sender:from:to:cc:subject:mime-version:date:message-id; bh=sQ8DknuOX6cEszUMAK4TjW4DpTvZqznr0/2Yp0CDLHo=; b=DBrGyaONyFBpVhbn1+CjZUD9gjG1UBk1O+llwONE8MBcZpPZX79Ejm+xpqSHicbwA9 sui/fYOAdOE0PXdmv4jJ47N/lC3kBxlCwzk7WDiKLVSKKZr1VH/7rajjTiGhA5uLNhG2 h3hVjPD14cR+/7iekBEJ9ZIxSxHjIIxNyOIbVUndp77h6/gieNhnLjv7d2dqUE7w+W42 6JtCo1Pd6Lj5fhAWYGR05RM3l3TlOCp8ANLE3aJ1gtGJ8tWq/R/6LTI6uaqLC+qMWQ7t 2OixnyEvFaaCDicHNlj0ExxBgGkja3+lF7AviEZrvoJOx+pP122LtHRxA5JlAUoSzbUH dFpQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:from:to:cc:subject:mime-version:date :message-id; bh=sQ8DknuOX6cEszUMAK4TjW4DpTvZqznr0/2Yp0CDLHo=; b=N75AYUgiqS+f12UqEQ2Ng09f/ZOU71O/WAOF0/dNxLDzyIT+6ualpkwJd+lan4JXKZ ut+IQpO+r/ntdNGGYMrE0fCdKNA5TZMxNDqEvukHS+ldHqtc8Ux9QA7Bgh7ohxqFbc0t ECr2IeoIStqWEWnv0TaYwMW/w/xAD0iWTF/Nrh5LpiOR/SL0IIVYbjhagiEE3TQKlKHp gobMvazIK5PJ049Q4tV7NlBiC0RCA029YtPGWvSuLrEVjhxzKqUtq6C1G+X8EKWccWwp VA4ZLBpm4y9O+U5uwHHbCVN1pJ4rMDLfhYF0TXzyx3zFmA+qVRBds/PnjJriTerKS6YW at0Q== X-Gm-Message-State: AOAM533T6HdvB1LPmL2P1QQvlNnoA+3/8EhQXCNGMj1ZoRygXHfORt7t n1+u9yjzoksYQ8JPED2fCNL/o3NE0UZP0w== X-Google-Smtp-Source: ABdhPJwRIYH8P0h+SOVfitntwxUwGY0psd45AWp5DOsEb7nsf/+7e1WVcQ2fn9Jq3w0g0ZsykFiNOg== X-Received: by 2002:ad4:568a:: with SMTP id bc10mr2585570qvb.29.1610500759367; Tue, 12 Jan 2021 17:19:19 -0800 (PST) Received: from turing-police ([2601:5c0:c380:d61::359]) by smtp.gmail.com with ESMTPSA id 9sm225861qtr.64.2021.01.12.17.19.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 12 Jan 2021 17:19:17 -0800 (PST) Sender: Valdis Kletnieks From: "Valdis =?utf-8?Q?Kl=c4=93tnieks?=" X-Google-Original-From: "Valdis =?utf-8?Q?Kl=c4=93tnieks?=" X-Mailer: exmh version 2.9.0 11/07/2018 with nmh-1.7+dev To: Kees Cook , Josh Poimboeuf , Geert Uytterhoeven cc: linux-hardening@vger.kernel.org, Linux Kernel Mailing List Subject: [PATCH v2] gcc-plugins: fix gcc 11 indigestion with plugins... Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Tue, 12 Jan 2021 20:19:16 -0500 Message-ID: <38485.1610500756@turing-police> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Fedora Rawhide has started including gcc 11,and the g++ compiler throws a wobbly when it hits scripts/gcc-plugins: HOSTCXX scripts/gcc-plugins/latent_entropy_plugin.so In file included from /usr/include/c++/11/type_traits:35, from /usr/lib/gcc/x86_64-redhat-linux/11/plugin/include/system.h:244, from /usr/lib/gcc/x86_64-redhat-linux/11/plugin/include/gcc-plugin.h:28, from scripts/gcc-plugins/gcc-common.h:7, from scripts/gcc-plugins/latent_entropy_plugin.c:78: /usr/include/c++/11/bits/c++0x_warning.h:32:2: error: #error This file requires compiler and library support for the ISO C++ 2011 standard. This support must be enabled with the -std=c++11 or -std=gnu++11 compiler options. 32 | #error This file requires compiler and library support \ Patch is more complicated than would otherwise be needed, because older gcc (4.9, 5.4) have gnu++11 but throw an error due to a gcc bug https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69959 Signed-off-by: Valdis Kletnieks --- diff --git a/scripts/gcc-plugins/Makefile b/scripts/gcc-plugins/Makefile index d66949bfeba4..cc779973724a 100644 --- a/scripts/gcc-plugins/Makefile +++ b/scripts/gcc-plugins/Makefile @@ -21,10 +21,13 @@ always-y += $(GCC_PLUGIN) GCC_PLUGINS_DIR = $(shell $(CC) -print-file-name=plugin) +# need gnu++11 for gcc 11, but 4.9 and 5.4 need gnu++98 +GCC_FLAVOR = $(call cc-ifversion, -ge, 1100, 11, 98) + plugin_cxxflags = -Wp,-MMD,$(depfile) $(KBUILD_HOSTCXXFLAGS) -fPIC \ - -I $(GCC_PLUGINS_DIR)/include -I $(obj) -std=gnu++98 \ + -I $(GCC_PLUGINS_DIR)/include -I $(obj) -std=gnu++$(GCC_FLAVOR) \ -fno-rtti -fno-exceptions -fasynchronous-unwind-tables \ - -ggdb -Wno-narrowing -Wno-unused-variable -Wno-c++11-compat \ + -ggdb -Wno-narrowing -Wno-unused-variable \ -Wno-format-diag plugin_ldflags = -shared